QCD sum rules for the 'Z POT + IND C' (3900) state.

We use the QCD sum rules to study the recently observed charmonium-like structure Z+ c (3900) as a tetraquark state. We evaluate the three-point function and extract the coupling constants of the Z+ c J/ψ π+, Z+ c ηc ρ+ and Z+ c D+ ¯D∗0 vertices and the corresponding decay widths in these channels. The results obtained are in good agreement with the experimental data and supports to the tetraquark picture of this state.

De creatione problemata 30 : cum sumariis singulorum problematum & ind. locorum Scripturae ...

Sammelband, Nr. 1

Synthesis of cyclopentane amide DNA (cpa-DNA) and its pairing properties

We recently reported on the synthesis and pairing properties of the DNA analogue bicyclo[3.2.1]amide DNA (bca-DNA). In this analogue the nucleobases are attached via a linear, 4-bond amide-linker to a structurally preorganized sugar-phosphate backbone unit. To define the importance of the degree of structural rigidity of the bca-backbone unit on the pairing properties, we designed the structurally simpler cyclopentane amide DNA (cpa-DNA), in which the bicyclo[3.2.1]-scaffold was reduced to a cyclopentane unit while the base-linker was left unchanged. Here we present a synthetic route to the enantiomerically pure cpa-DNA monomers and the corresponding phosphoramidites containing the bases A and T, starting from a known, achiral precursor in 9 and 12 steps, respectively. Fully modified oligodeoxynucleotides were synthesized by standard solid-phase oligonucleotide chemistry, and their base-pairing properties with complementary oligonucleotides of the DNA-, RNA-, bca-DNA-, and cpa-DNA-backbones were assessed by UV melting curves and CD-spectroscopic methods. We found that cpa-oligoadenylates form duplexes with complementary DNA that are less stable by -2.7 degrees C/mod. compared to DNA. The corresponding cpa-oligothymidylates do not participate in complementary base-pairing with any of the investigated backbone systems except with its own (homo-duplex). As its congener bca-DNA, cpa-DNA seems to prefer left-handed helical duplex structures with DNA or with itself as indicated by the CD spectra

Sēfer Tif'eret Yiśrā'ēl : ind dizen seifer werṭ ertzelṭ zeier winderliche zachin fun dem heiligin tzadik r. Jiśroel ... fun Rizin ; oich fun zain zuhn ha-tzadik r. Avraham Jakov ... fun Sandiger ... arois ginumen fun heilige seforim ...

Digitalisat der Ausg. Pšemišl, 1911

CPA Shortage

This report is on current issue of the shortage of Certified Public Accountants. It discusses the reasons for the shortage, such as the newest 150-hour requirement, as well as the increased need for accountants after Sarbanes-Oxley. Also, It discusses what companies are doing to get more people into the accounting profession and keep the people they have. There is also a Case Study on what Deloitte & Touche is doing to help their firm. This paper develops ideas and possible solutions to help accounting firms deal with and change the current shortage situation they are in.